It was Swissair 111 in 1998.

 http://www.bst.gc.ca/en/reports/air/1998/a98h0003/01report/01factual/rep1_18_07.asp

The cause was determined to be chafed wires (aged wiring losing its insulation) forming a short circuit and igniting the overhead soundproofing insulation just behind the cockpit.

The wiring was Kapton wire... and is referenced here

 http://www.vision.net.au/~apaterson/aviation/kapton_mangold.htm

I'm not sure, but I don't think EDIG would be using this product in their units.